Q. A frog tries to come out of a dried well 4.5 m deep with slippery walls. Every time the frog jumps 30 cm, slides down 15 cm. What is the number of jumps required for the frog to come out of the well?

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Solution

The correct option is B 29
4.5 m = 450 cm. After 28 jumps, the frog climbs
28 x (30 – 15) = 28 x 15 = 420 cm. In the 29th jump, the frog will reach the top of the well, so it won’t slip back on slippery walls.

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Q. A frog tries to come out of a dried well 4.5 m deep with slippery walls. Every time the frog jumps 30 cm, slides down 15 cm. What is the number of jumps required for the frog to come out of the well?

The correct option is B 294.5 m = 450 cm. After 28 jumps, the frog climbs 28 x (30 – 15) = 28 x 15 = 420 cm. In the 29th jump, the frog will reach the top of the well, so it won’t slip back on slippery walls.

The correct option is B 29
4.5 m = 450 cm. After 28 jumps, the frog climbs
28 x (30 – 15) = 28 x 15 = 420 cm. In the 29th jump, the frog will reach the top of the well, so it won’t slip back on slippery walls.